Draft attachment for tractors



F. D. HALL. y DRAFT ATTACHMENT FOR TRACTOHS. APPLICATIQN. FILED JAN. 29. 1920.

Patented Mar. 7, 1922.

3 SHEETS-SHEET l.

F. D. HALL.

DRAFT ATTACHMENT FDR TRACTORS. APPLICATION FILED 1AN.29. 1920.

Patented Mar, 7, 1922.

a SHEETS-sum 2.

F. D. HALL. DRAFT ATTACHMENT FOR TRACTORS. APPLICATION FILED JAN. 29.I 1920.

1,408,590. Patented Mar. 7, 1922.

3 SHEETS-SHEET 3.

.Y z6- G 6J o Zing 3 o l .o Y I 8[&/4Z 0 Y v 6 4 o UNITED STATES PATENT orfFicE...

FRED D. HALL, OF CRANDALL, SOUTH DAKOTA, ASSIGNOR OF ONE-HALF TO LEDERMANN, OF GRANDALL, SOUTH. DAKOTA.

moois 'DRVAFT ATTACHMENT FORl TB/ACTORS;

T 0 all wiomzt may concern/i' Be it known that I, Finn) D. liant, citizen ot theV United States, residing at Crandall, in the county of Day and State of South Dakota, have inventedl certain new and usevful Improvements in Draft Attachments for Tractors, or' which the followingl is a specification.

This invention relates to an improved draft governor for tractors or other motor vehicles and has as one of its principal objects to provide a mechanism whereby a teamc'r horses may be hitched to the tractor tor supplementing the motive power thereof.

The invention has as a further object to provide a mechanism wherebya team ot horses attached to the tractorcan guide the tractor.

A still further object ot the invention is to provide a mechanism wherein the motive power of the tractor will be governed by the draft ot the team of horses attached thereto.

Andy the invention has a Vstill :further object to provide'a mechanism wherein the draft required to eiiect a given opening of the throttle valve oit the tractor may be readily varied. Y

Other and incidental hereinafter'.

In the drawings: l

Figure 1 is a side elevation showing my improved attachment applied to a conventional type of tractor, Darts being broken away, j j l Figure 2 is a plan view particularly illustrating the disposition of the draitt bar ot the attachment, j j

Figure 3 is a rear elevation showing the winding drum employed for varying the load upon a team attached to the tractor,

Figurea is a detail perspective view particularly illustrating the bracket employed for supporting thedratt bar, and-y `Figure 5 is a detailA sectional view showing the dash potemployed in connection with the tractorthrottle control.

In' order to facilitate an accurate understanding oi the present invention, I- have shown the invention in connection with: a conventional type or' tractor. This tractor isiormed withtlie usual chassis trame 10 upon the rear portion of which is mounted the cab 11. A transverse bar 12 extends between the sides oli this cab at thefrear ot the tractor. The front wheels ot the tractor objects will appear Specification of Letters Patent.

tive length of the cable.

Patented Mar. 7, 1922.

Application filed January 29, 1920. 'Serial No. 354,898.

are indicated at 13 and the steering knuckles of these wheels are coupled by the usual connecting rod 14 so that the tractor may be steered in the usual manner. `The carbureter of the traction engine, as best shown in Figure 1, is indicatedat 15. This carbureter has the usual throttle yvalve operated by a lever 1G whereby the speed ot the tractor may be controlled.` In applying the present invention, the usual speed governor i'or the tractor engine is disconnected therefrom or otherwise rendered idle.

In carrying-'the invention into effect, I

employ a tbracket 1T ot the type illustrated in Figure et. This bracket is bolted or otherwise secured to the chassis frame 10 at its iront end to extend transverselywith respectto the tractor and, at one end, isv 'formed with a bowed depending arm 18. This arm extends over the adjacent liront wheel of the tractor and is provided with a laterally and outwardly directed lower end portion 19. At, the end thereof opposite the arm 18,

the bracket is formed with an upstanding arm 20,'the upper end portionv ol which is curved outwardly and Yforwardly 'tronithe tractor. Projecting from said arm is a lug 21 secured to the tractor radiator tor bracing the upper end portion of the arm.l Swiveled upon the laterally directed portion `,19`oit the arm 18 is a block, 22 and Ipivotally connected to the forward end of this block is tongue 23 which may thus be swung both vertically and horizontally. Projecting from the steering knuckle ot that front Vwheel ot the tractor lying at the side thereof opposite the tongue 23 is a forwardly directed 'steering armA 2&5 and extending between this arm and the inner end portion ot the tongue is a steering rod Consequently, as will be seen, the tractor may be guided by the tongue 2B. A joint 26 is interposed in the rod 25 to permit vertical movement ot the tongue. f f l Lying across the tongue isa d ra'tt` bar 2T and connected to one end of this bar is a ,chain Q8. Securedlto` any suitable portion oi the tractor at the adjacent side thereof is a cable 29 which, at its forward end, carriesa hook selectively engageable in: the links ot the chain 28 for varying the eilec- As best shown in Figures 1 and 2, the cable is trainedaround "a pulley SOinounted upon the outer end ot the laterally directed portion 19 of the arm rio 18 so that the cable will thus anchor the draft bar 27 at its adjacent end. Connected to the contiguous end portion of the draft har for adjustment thereon, the bar being as particularly shown in Figure 2, provided with a series of openings for this purpose, is a clerics 3l in which is engaged a chain 32 connecting a double-tree 33 with the bar so that a pair of draft animals at opposite sides of the tongue 223 may pull against the bar. The draft bar is supported in substantially horizontal position by a rod lli connected by a short length of chain with the arm 2O of the bracket 11T and engaged with the contiguous end of the bar is a spring 35 to which is connected a cable 36. hlounted, as particularly shown in VFigure 3, upon the rear transverse bar l2 of the tractor is a bracla'et 37 projecting laterally beyond the adjacent rear wheel of the tractor' and provided with a pair of upstanding bearing lugs 38 and a third i'ipstanding bearing lug 39 alining with the first lugs. A hearing luga() projects horizontally from the bracket adjacent the lug Journaled through the lugs 3S and 39 is a .horizontal shaft il upon which is mounted, between the pair of lugs 3S, a nf'inding drum 4t2 to which is connected the cable 3G. .Mounted upon the opposite end of said shaft is a worm i-3 with which coacts a worin is upon a, vertical shaft 45 journaled .at its lower end through the lug` 40 of the bracket. The shaft #l5 is Connected to the adjacent side of the cab 1l of the tractor by suitable bearings 4G and at its upper end carries a hand wheel 47. Associated with the shaft l1 is a ratchet 4:8 so that, as will be seen, the hand wheel et? may be turned for winding the cable '36 upon the drinn l2 and consequently inclining the bar 2T horizontally. Connected to the forward end portion of the cable 36 is a short length of cable 4,9 carrying, at its free end, a. hook selectively el'igageable in the linlrs of a chain 50 connected to the free end of the draft bar. As will be seen, the cable 4.19 and chain will thus provide a, means for adjustably limiting the expansive movement of the springfi.

Connected to thc intermediate portioinof the draft bar Q7 for .adjustment therealong is a clevis 5l and engaged with this clevis is a cable 52 which, as particularly shown in Figure l, is connected with the throttle valve lever 16 of the carbureter of the tractor engine. A spring 53 is interposed in the cable 52 and is designed to absorb sudden jerks upon the cable. However, to further prevent fluttering of the throttle valve or too sudden opening thereof, I employ a dash pot of the type particularly shown in Figure 5 of the drawings. This dash pot includes a cylinder 54 to the upper end of which :is connected a hanger 55 suspending the dash pot from any convenient portion of the tractor engine or associated parts. ltflounted to reciprocate within the cylinder is a piston 56 having a piston rod 5T extending through the lower end of the cylinder and mounted upon the piston iis a valve 5S. Extending between the upper end of the cylinder and the piston is a spring 59 normally tending to retract the piston upwardly within the cylinder and connecting the end portions of the cylinder at opposite sides of the piston is a bypass pipe 60 in which is interposed a valve 6l. Connected at one end to the piston rod 57 is a cable 62 which is carried around a suitably located pulley .and is engaged at its opposite end with the throttle valve lever 16. The cylinder 54 is suitably lled with oil so that downward' movement of the piston will serve to trap a portion of the oil in the lower end of the cylinder, the lvalve 58 moving to closed position coincidentV with downward movement of the piston. Thus, downward travel of the piston will be governed by the flow of oil in the lower portion of v'the cylinder through the bypass (lo. However, as will be appreciated, the rate of downward travel of the piston may be readily varied by adjusting the valve Gl.

As will now be understood in view of the preceding' description, the draft of a team of horses upon the bar 27 will tend to swing the free end of said bar and consequently pull upon the cable so that the spring 523 will he stretched. Then as the piston of the dash Vpot moves downwardly, the throttle valve ot' the engine carburetor will be permitted to open. Thus, the motive power of the tractor will be directly governed by the draft upon the draft bar 27 and by adjusting the horizontal inclination of the draft bar, the pull required upon the bar to open the throttle valve may be readily varied. Accordingly, the load upon the draft animals connected to said bar may, in turn, be readily regulated as desired.

Mounted within the tractor cab is a. hand. lever 653 to which connected a spring (34- acting to swing the lever forwardly and associated with the lever is a. latch (S5 for ad,- j ustably securing the lever'against forward movement. Connected at one end to the lever is a cable 66, the opposite end of which is secured to the cable 52 in the rear of the spring 53. Thus, by manually swinging the levell 63 rearwardly, the portion of the cable between the sprin `53 and the lever 16 of the throttle valve of t ek carbureter may be slackened so that pull upon lthe draft bar 27 cannot serve to open the throttle. Accordingly, the tractormay be stopped while the engine may be permitted to continue running without likelihood of the draft team racing the motor by pulling upon the draft bar. Within the tractor cab in advance of the lever 63 is a pivoted foot lever 67 to which is connected `a spring 68 acting to rock theV lever forwardly and connected at one end to the 

